In case you had any lingering doubts, here is some masterful cosmological/geological/geometrical instruction on our planet and its spherical — but not perfectly spherical — tendencies, courtesy of the ever-capable Henry Reich (better known as the creator, animator and narrator of MinutePhysics). Some great, if not… »1/03/13 2:24pm 1/03/13 2:24pm

Earth is changing. It's changing so fast that images like this one, which show our planet's Arctic polar ice cap in unprecedented detail, could be impossible to capture, as soon as twenty years from now. »6/19/12 1:48pm 6/19/12 1:48pm

This is an absolutely stunning (and completely real) video of Earthrise on the Moon. Every once and a while we need a jolt to remind us just how small and fragile our little blue marble Earth is. The Japanese Kaguya satellite has delivered with these jaw-dropping high-definition videos of what Earthrise and Earthset… »5/13/08 2:06pm 5/13/08 2:06pm